WO1998000685A3 - Method and apparatus for flow measurement with temperature and density compensation - Google Patents

Method and apparatus for flow measurement with temperature and density compensation Download PDF

Info

Publication number
WO1998000685A3
WO1998000685A3 PCT/US1997/011354 US9711354W WO9800685A3 WO 1998000685 A3 WO1998000685 A3 WO 1998000685A3 US 9711354 W US9711354 W US 9711354W WO 9800685 A3 WO9800685 A3 WO 9800685A3
Authority
WO
WIPO (PCT)
Prior art keywords
phase
comparator
ultrasonic
reference signal
ultrasonic signal
Prior art date
Application number
PCT/US1997/011354
Other languages
French (fr)
Other versions
WO1998000685A2 (en
Inventor
John Zscheile
Jeffrey F Puckett
Richard S Eidens
Original Assignee
Rocky Mountain Research Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rocky Mountain Research Inc filed Critical Rocky Mountain Research Inc
Priority to AU36457/97A priority Critical patent/AU3645797A/en
Priority to CA002259372A priority patent/CA2259372C/en
Publication of WO1998000685A2 publication Critical patent/WO1998000685A2/en
Publication of WO1998000685A3 publication Critical patent/WO1998000685A3/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621—Extra-corporeal blood circuits
    • A61M1/3626—Gas bubble detectors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621—Extra-corporeal blood circuits
    • A61M1/3663—Flow rate transducers; Flow integrators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/28—Clamping means for squeezing flexible tubes, e.g. roller clamps
    • A61M39/281—Automatic tube cut-off devices, e.g. squeezing tube on detection of air
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/667—Arrangements of transducers for ultrasonic flowmeters; Circuits for operating ultrasonic flowmeters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621—Extra-corporeal blood circuits
    • A61M1/3623—Means for actively controlling temperature of blood
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3331—Pressure; Flow
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3368—Temperature
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3375—Acoustical, e.g. ultrasonic, measuring means

Landscapes

  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Public Health (AREA)
  • Physics & Mathematics (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Veterinary Medicine (AREA)
  • Anesthesiology (AREA)
  • Fluid Mechanics (AREA)
  • Cardiology (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Pulmonology (AREA)
  • Measuring Volume Flow (AREA)
  • Details Of Flowmeters (AREA)

Abstract

A transit time ultrasonic flow meter (40) includes a pair of ultrasonic transducers (44, 46) transmitting an ultrasonic signal through a fluid (48) flowing in a conduit (50) and receiving the transmitted ultrasonic signal. A comparator then detects a difference in phase between the received ultrasonic signal and a reference signal having a selected phase shift with respect to the transmitted ultrasonic signal. Control circuitry (52) selects the phase shift of the reference signal based on outputs of the XOR phase comparator in order to maintain the phase shifts detected by the XOR phase comparator. Since the outputs of the phase comparator are correlated to fluid flow, adjusting the phase of the reference signal enhances the inventive flow meter's measurement of fluid flow.
PCT/US1997/011354 1996-06-28 1997-06-27 Method and apparatus for flow measurement with temperature and density compensation WO1998000685A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU36457/97A AU3645797A (en) 1996-06-28 1997-06-27 Method and apparatus for flow measurement with temperature and density compensation
CA002259372A CA2259372C (en) 1996-06-28 1997-06-27 Method and apparatus for flow measurement with temperature and density compensation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US2086796P 1996-06-28 1996-06-28
US60/020,867 1996-06-28

Publications (2)

Publication Number Publication Date
WO1998000685A2 WO1998000685A2 (en) 1998-01-08
WO1998000685A3 true WO1998000685A3 (en) 1998-10-15

Family

ID=21801018

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/011354 WO1998000685A2 (en) 1996-06-28 1997-06-27 Method and apparatus for flow measurement with temperature and density compensation

Country Status (4)

Country Link
US (1) US6390999B1 (en)
AU (1) AU3645797A (en)
CA (1) CA2259372C (en)
WO (1) WO1998000685A2 (en)

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* Cited by examiner, † Cited by third party
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NL1009485C2 (en) * 1998-06-24 2000-01-11 Wilhelm Henricus Jurriaan Van Acoustic runtime measurement.
EP1094303A1 (en) * 1999-10-18 2001-04-25 Aquametro AG Flow measurement
EP1094304A1 (en) * 1999-10-18 2001-04-25 Aquametro AG Improvements relating to flow measurement
US6595071B1 (en) 2000-01-06 2003-07-22 Transoma Medical, Inc. Estimation of error angle in ultrasound flow measurement
AU2759601A (en) * 2000-01-06 2001-07-16 Data Sciences International, Inc. Estimation of error angle in ultrasound flow measurement
US6622542B2 (en) * 2001-03-20 2003-09-23 Therox, Inc. Bubble detector and method of use thereof
WO2004036150A2 (en) * 2002-10-18 2004-04-29 Lian-Pin Lee Multi-modality ultrasonic density/solute monitor
US7177664B2 (en) * 2003-11-10 2007-02-13 Ronald Lachman Bluetooth interface between cellular and wired telephone networks
US7124621B2 (en) * 2004-07-21 2006-10-24 Horiba Instruments, Inc. Acoustic flowmeter calibration method
GB2424368B (en) * 2005-03-23 2009-09-23 Dlp Ltd Pumped drainage apparatus
US7152490B1 (en) 2005-08-15 2006-12-26 Daniel Measurement And Control, Inc. Methods for determining transducer delay time and transducer separation in ultrasonic flow meters
DE102006045452B4 (en) 2006-09-26 2009-04-02 Fresenius Medical Care Deutschland Gmbh Method and device for detecting air in a fluid system, in particular in an extracorporeal blood circuit of a blood treatment device
US20100143192A1 (en) * 2008-12-04 2010-06-10 Therox, Inc. Method and device for combined detection of bubbles and flow rate in a system for enriching a bodily fluid with a gas
WO2012129101A1 (en) 2011-03-18 2012-09-27 Soneter, LLC Methods and apparatus for fluid flow measurement
WO2012157546A1 (en) 2011-05-13 2012-11-22 ローム株式会社 Projector
AT509641B1 (en) * 2011-06-24 2012-08-15 Avl List Gmbh METHOD FOR DETERMINING FLUX FLOW AFTER ULTRASONIC TIME METHOD
JP5999592B2 (en) * 2011-09-07 2016-09-28 ローム株式会社 Receiver circuit, semiconductor device, sensor device
US9718666B2 (en) 2014-12-12 2017-08-01 Veeder-Root Company Fuel dispensing nozzle with ultrasonic transducer for regulating fuel flow rates
DE102015102200B4 (en) 2015-02-16 2022-08-11 Endress+Hauser Flow Deutschland Ag Method for determining properties of a medium and device for determining properties of a medium
US9928724B2 (en) 2015-05-13 2018-03-27 Rachio, Inc. Flow characteristic detection and automatic flow shutoff
EP3320840B1 (en) * 2016-11-11 2022-08-17 Tata Consultancy Services Limited System and method for pulmonary health monitoring
EP3638985B1 (en) * 2017-06-12 2024-05-22 Renesas Electronics Corporation Ultrasonic flow measurement
FI128408B (en) * 2017-07-07 2020-04-30 Flaekt Woods Ab Equipment and method for measuring an airflow
GB201804449D0 (en) * 2018-03-20 2018-05-02 Univ Warwick Fluid flow speed method and apparatus
CN109186693B (en) * 2018-08-02 2020-05-19 电子科技大学 Self-adaptive ultrasonic echo signal detection circuit
EP3779374B1 (en) * 2019-03-20 2022-08-17 Shenzhen Goodix Technology Co., Ltd. Time of flight generation circuit, and relevant chip, flow meter and method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3727454A (en) * 1970-02-27 1973-04-17 Thomson Csf Ultrasonic systems for carrying out flow measurements in fluids
US4052896A (en) * 1975-11-26 1977-10-11 Badger Meter, Inc. Ultrasonic flow meter
US4452090A (en) * 1982-05-17 1984-06-05 Airco, Inc. Ultrasonic flowmeter
US4555947A (en) * 1982-05-19 1985-12-03 Ihc Holland N.V. Method and apparatus for the measurement of fluid flow velocities
US5052230A (en) * 1988-07-08 1991-10-01 Flowtec Ag Method and arrangement for flow rate measurement by means of ultrasonic waves
US5152174A (en) * 1990-09-24 1992-10-06 Labudde Edward V Mass flow rate sensor and method

Family Cites Families (6)

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US4227407A (en) 1978-11-30 1980-10-14 Cornell Research Foundation, Inc. Volume flow measurement system
JPS587523A (en) 1981-07-07 1983-01-17 Honda Motor Co Ltd Ultrasonic wave type air flowmeter for vehicle
US4611496A (en) 1983-07-27 1986-09-16 Tokyo Keiki Co., Ltd. Ultrasonic flow meter
US4596133A (en) 1983-07-29 1986-06-24 Panametrics, Inc. Apparatus and methods for measuring fluid flow parameters
DE3720665A1 (en) * 1987-06-23 1989-01-05 Schael Wilfried DEVICE FOR HAEMODIALYSIS AND HAEMOFILTRATION
US5445613A (en) 1993-07-16 1995-08-29 Rocky Mountain Research, Inc. Condition detection system and clamp

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3727454A (en) * 1970-02-27 1973-04-17 Thomson Csf Ultrasonic systems for carrying out flow measurements in fluids
US4052896A (en) * 1975-11-26 1977-10-11 Badger Meter, Inc. Ultrasonic flow meter
US4452090A (en) * 1982-05-17 1984-06-05 Airco, Inc. Ultrasonic flowmeter
US4555947A (en) * 1982-05-19 1985-12-03 Ihc Holland N.V. Method and apparatus for the measurement of fluid flow velocities
US5052230A (en) * 1988-07-08 1991-10-01 Flowtec Ag Method and arrangement for flow rate measurement by means of ultrasonic waves
US5152174A (en) * 1990-09-24 1992-10-06 Labudde Edward V Mass flow rate sensor and method

Also Published As

Publication number Publication date
AU3645797A (en) 1998-01-21
CA2259372A1 (en) 1998-01-08
WO1998000685A2 (en) 1998-01-08
US6390999B1 (en) 2002-05-21
CA2259372C (en) 2004-10-19

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